Find coal production at the borders (6)
I believe the answer is:
locate
'find' is the definition.
(locating is a kind of finding)
'coal production at the borders' is the wordplay.
'production' is an anagram indicator.
'at' means one lot of letters go next to another.
'borders' suggests removing the centre (only the edge or border letters remain).
'the' with its centre removed is 'te'.
'coal' anagrammed gives 'loca'.
'loca'+'te'='LOCATE'
(Other definitions for locate that I've seen before include "Find by searching" , "Discover the place where something is" , "Find; lay hands on" , "Pinpoint the position" , "Discover the position of something" .)